Planoobaph co



W. 0.1. ANDERSSON.

CALCULATING MACHINE.

APPLICATION FILED Aue. 1.6. ms. 1,310,852, Patented July 22, 1919.

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W. 0. J. ANDERSSON.

CALCULATING MACHINE.

APPLICATION FILED AUG. 16. 1918.

Patented July 22, 1919. [3.9. 2 SHEETSSHEET 2 u 1 a! Q. Q

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// INYEATOR;

m! COLUMIIA PLANOOIAPM cm, WASHINGTON, D. C.

WIGTOR OSKAR JULIUS ANDERSSON, 0F MALMb, SWEDEN.

CALCULATING-MACHINE.

Specification of Letters Patent.

Patented July 22, 1919.

Application filed August 16, 1918. Serial No. 250,157.

To all whom it may concern:

Be it known that I, lVIoToR OsKAR JULIUS ANDERssoN, a subject of the King of Sweden, residing at Malmti, in the county of Malindhus and Kingdom of Sweden, have invented new and useful Improvements in Calculating-Machines, of which the following is a specification. Y

This invention relates to improvements in calculating machines of the type wherein pawls engage in pinions of the counter .wheels and every pawl by itself is adjustable but all together are released during restoration of the vcounter wheels into zero position.

The object of the invention is to construct a bridge supporting all the pawls and parallelly movable in order to release all the pawls during restoring of the counter wheels.

Two forms of the invention are illustrated, by way of example, in the accompanying drawings and wherein:

Figures 1 and 2 illustrate partly a front elevation and partly a section of a part of the bridge in two different positions,

Figs. 3, 4 and 5 illustrate in three different positions an end elevation of a device c0- operating with the bridge,

Figs. 6 and 7 illustrate a top view of the cooperating devices in two different positions,

Figs. 8 and 9 are two end elevations of the bridge and the cotiperating device in two different positions,

Fig. 10 illustrates a cross section of the bridge and an end elevation of the pinion on the counter wheel.

The counter wheels 4 provided with pinions 3 are in the usual way mounted on a shaft 2, supported by the counter slide 1. The pinions 3 are kept in their value positions by means of pawls 6 pivotally mounted on a shaft 5 and provided at its inner end with a tooth 7 engaging in the pinion 3. The shaft 5 is fixed in a support 8 provided with grooves 12 and guide pins 9, projecting through a vertically slidable bridge 10 provided with grooves 13 corresponding to the grooves 12 and admitting the outerendsof the pawls 6. The bridge 10 is provided with holes which communicate with the grooves 13, as shown in Fig. 1. Each holereceives at its upper end a screw threaded sleeve 17. A bolt 11 is slidably mounted in the sleeve disk 36.

17 and is pressed downward by means of a spiral spring 1 1 pressed between a flange 15 of the bolt 11 and the sleeve 17. On the upper end of the bolt 11 is screwed a nut 16 by means of which the distance between the sleeve 17 and the flange 15 can be varied to adjust the tension of the spring 14. Consequently, the pressure of the pawl 6 on the pinion 3 can be adjusted in such a way that the tension of the spring rises only as soon as the pawl is forced out of the catching position. The bridge 10 is raised from the position illustrated in Fig. 1 to the position illustrated in Fig. 2 by means of levers 19 fixed on a shaft 18 andfork shaped at the outer ends, every one embracing a pin 20 in the bridge 10. Further on the shaft 18 is fixed on a lever 21 connected with the counter slide 1 by means of a spiral spring 22, which tends to swing the lever 21 to the right as in Figs. 3, 4 and 5 and thus raises the bridge 10. The upper end of the lever 21 is provided with a pin 23, pivotally mounted in a ring 24. resting on the edge of a cam disk 25, which is provided with two diametrically opposed projections 26. The cam disk 25 is secured on a cylinder 27 pivotally mounted on the shaft 2 and at the end provided with two diametrically opposed grooves, embracing the ends of a pin 28 secured in the shaft 2. On the cylinder 27 is rotatably mounted a pinion 29 provided at the side with two projections 30, embracing the ends of the pin 28 by revolving of pinion 29 clockwise and movlng the shaft 2. Between the pinion 29 and the cam disk 25 is pressed a spiral spring 31 surrounding the shaft 2 and actingto press the pinion 29 toward the pin 28. The shaft 2 is mounted in a plate 32, and at its right end (Figs. 6 and 7) is provvided with acam disk 36 cooperating with a pin 35 projecting from the inner side of a cap 34 secured on the side of the machine casing 33 and-entering in a groove 44 in the These members are arranged in such a way that by rotation of the shaft 2 in a clockwise direction (Figs. 35) the shaft is slid to the left (Figs. 6 and 7 whereby pins 42 secured on the shaft 2 cooperate with pins 43 secured on the pinions 3, so that the counter wheels 4 are revolved into their zero position. A spiral spring 37 surrounding the shaft 2 is pressed between the camdisk 36 and the end of the cylinder 27, which is fixed to the cam disk 25 supand the pin ported by a ring 38 on the plate 32. The spring 37 attempts to press the shaft 2 at the right. On a shaft 40 mounted in the machine casing 33 and provided with a crank 39 is secured a pinion segment 41 which meshes with the pinion 29.

The operation of the device is as follows:

In order to restore the adjusted counter wheels 4 to zero position, thecrank 39 is swung to the left from its normal position as illustrated in Fig. 3 whereby, the pinion 29 is turned to the left by means of the cog segment 41. By means of the projections 30 28; the shaft 2 is also turned and the cam disk 25 revolved at the same time as the shaft is slid to the left on account of the cooperation between the pin 35 and the disk 36. By revolving the cam disk 25 the pin 23 slides from the projection 26 and the lever 21 swings to the right (as illustrated in Fig. 5) by means of the spring 22, whereby the bridge 10 is raised to the position illustrated in F igi 2 so that the tooth 7 releases the pinion 3 at the same time as the pinion 3 is revolved into its zero position. By further swinging of the crank 39' into the left final position illustrated in Fig. 4, the cam disk 25' as well as the pinions 29 and 3 have been revolved half a turn and the counter wheels being provided withtwo series of numbers have been'turned to the other zero position, at the same time'as the other projection 26 has reached the pin 23, whereby the lever 21 in return swings to the left and the bridge 10 is lowered to its normal position. At the same time the pin 35 moves into the groove32 and the shaft 2 is pressed to the right position (Fig. 6) by means of the spring 37, whereby the pin 42 disengages the pin 43 and the pinion 29 is released from the pin 28. The crank 39 is returned to its normal position (Fig. 3) by means of a spiral spring 55 (Figs. 6 and 7 The Figs. 8 and 9illustrate another embodiment of the device for raising the bridge 10. In this form the cam disk 25 is replaced by a disk 45 provided with a groove 46 having two inwardly bent curves 49. Secured on the shaft 18 is a lever 47 provided with a pin 48 entering in the groove 46.

The operation of this device is practically identical toithe first form of my invention, as will be understood.

Having thus described my invention, what I claim as new and desire to protect by Letters Patent is 1. In a calculating machine, a cam disk, a counter wheel, a pinion movable with the counter Wheel, a pawl for locking said pinion against rotation, a, movable bridge, means carried by said bridge and engageable with said pawl for biasing the latter to locking position, manually operable means for rotating said cam disk, and means operable by said cam disk for lifting said bridge to render said blasmg means inactlve.

2. In a Calculating machlnc, a cam disk,

a counter wheel, a pinion movable with the ing position, manually operable means for rotating said cam disk,'and means operable by said cam disk for lifting said bridge to render said biasing means inactive.

3. In a calculating machine, a cam disk, a counter wheel, a pinion movable with the counter wheel, a pawl for locking said pinion against rotation, a vertically movable bridge, adjustable biasing means carried by said bridge for forcing said pawl into. look ing position, manually operable means for rotating said c'aim disk, projections formed on said cam disk, a lever biased toward said cam" disk and adapted to engage said projectio'n's, and means operable by said lever for lifting said bridge to render said biasing means inactive when said cam disk is rotated. 7

4.111 a calculating machine, a shaft, a cam disk fixed to said shaft, a plurality of counter wheels onsaid shaft, pinions fixed to each of said counter wheels, manually operable means for rotating said shaft, a plurality f pawls for locking said pinions against rotation, adjustable means forindependently biasing each of said pawls to locking position, and means operable by 7 said cam disk for simultaneously rendering all of said biasing means inactive-to allow said pawls to disengage said pinions.

5. In a calculating machine, a shaft, counter wheels on. *said shaft, pinions fixed to each of -said counter wheels, p'awls "for locking each of said pinions against rotation, a vertically movable bridge, biasing means for each of said pa-wls carried by said bridge, manually operable means for rotatingsaid shaft, and means *operatively-fconr nected to said shaft for lifting said bridge to permit said pawls to disengage said pinions when said 'sh'aftis rotated.

6. In a calculating machine, a longitudi nally movable shaft, counter wheels loosely fitted'on said shaft, pinions fixed to each of said counter wheels,'means for locking said counter wheels to said shaft when the latter occupies a predetermined position, means for normally locking-said pinions against rotation, means for biasing the last mentioned locking means into active position,

manually operable means for moving sald blaslng means to lnactlve position to' release said pinions and to move said shaft to said predetermined position, at the same time rotating the shaft to cause rotation of said counter wheels.

7. In a calculating machine, a plurality of of said biasing means are rendered inactive 10 rotatable counter wheels, a locking pawl for simultaneously. each counter wheel, a vertically movable In testimony whereof I have aflixed my bridge, biasing means for each of said pawls signature in presence of two witnesses. carried by said bridge, each of said biasing WIGTOR OSKAR JULIUS ANDERSSON. means being independently ad ustable to vary its biasing action and to limit the move- Witnesses: ment of its respective pawl, and rockable ALEX TAYELLSON, means for lifting said bridge whereby all R. FRITTSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of 2mm, Washington, D. 0." 

